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The Suspended Solids / Sludge Concentration Sensor is designed for continuous online measurement of suspended solids (SS) and sludge concentration (MLSS) in water and wastewater treatment processes.
Based on ISO 7027 infrared scattered light technology, the sensor effectively eliminates the influence of sample color and provides stable, repeatable, and reliable measurement results. It is widely used in municipal and industrial wastewater treatment plants, process water systems, and environmental monitoring applications.
Deskripsi Pemancar & Sensor
Suspended Solids Sludge Sensor Key Features & Advantages
ISO 7027 Standard Method
Uses infrared scattered light technology to minimize color interference and ensure measurement consistency.
Dual-Beam Infrared Scattering Detection
Improves accuracy, repeatability, and long-term stability.
High Measurement Reliability
Excellent repeatability and stability, suitable for continuous online monitoring.
Built-in Self-Diagnostic Function
Automatically monitors sensor status to ensure reliable and accurate data output.
Optional Automatic Cleaning Scraper
Reduces fouling and maintenance frequency, especially in high-solids applications.
RS485 Communication
Supports connection to upper-level systems such as PLC, SCADA, or data acquisition units.


Suspended Solids Sludge Sensor Typical Applications
Municipal wastewater treatment plants
Pengolahan air limbah industri
Activated sludge process monitoring (MLSS)
Sedimentation tanks and aeration basins
Environmental water monitoring
Process water systems with suspended solids
Suspended Solids Sludge Sensor Measurement Principle
The sensor applies infrared scattered light photometric technology in accordance with ISO 7027. When infrared light passes through the sample, suspended solids scatter the light. The scattered light intensity is detected by a dual-beam system and converted into a concentration value, ensuring accurate measurement independent of sample color.


Suspended Solids Sludge Sensor Installation & Maintenance
The sensor is designed for submersible installation and can be directly immersed in tanks, channels, or pipelines.
For applications with high fouling potential, the optional automatic cleaning scraper is recommended to reduce maintenance workload and ensure long-term measurement stability.
Parameter Pemancar & Sensor
| Parameter | Spesifikasi |
|---|---|
| Rentang Pengukuran | 0.01 – 45,000 mg/L / 0.01 – 120,000 mg/L |
| Kisaran Suhu | 0 – 45 °C |
| Rentang Tekanan | ≤ 0.4 MPa |
| Akurasi Pengukuran | ±5% FS |
| Flow Velocity | ≤ 2.5 m/s |
| Sinyal Keluaran | RS485 |
| Bahan Perumahan | 316L Stainless Steel + PVC |
| Kelas Perlindungan | IP68 |
| Dimensi | Ø60 × 256 mm |
| Metode Instalasi | Submersible |
| Suhu Sekitar | 0 – 60 °C |
| Kelembaban Sekitar | <90% RH |
| Signal Cable | 10 m standard, customizable up to 100 m |
Instrava OEM / ODM
Instrumen yang Dapat Diandalkan. Solusi yang Sesuai dengan Aplikasi Anda.
Instrava berfokus untuk memberikan solusi industri yang andal melalui produk yang dipilih dengan cermat, pengoptimalan berbasis aplikasi, dan penyesuaian yang fleksibel. Kami memilih instrumen yang telah terbukti dari produsen tepercaya untuk memastikan kualitas yang konsisten, mengoptimalkan solusi berdasarkan kondisi kerja nyata untuk memecahkan tantangan praktis, dan menyediakan konfigurasi yang disesuaikan untuk memenuhi kebutuhan aplikasi tertentu.
Dengan menggabungkan keahlian pemilihan dengan pemahaman aplikasi, Instrava membantu pelanggan mengurangi risiko, meningkatkan efisiensi, dan mencapai hasil yang dapat diandalkan dalam lingkungan industri yang kompleks.

What is the difference between SS and MLSS measurement in wastewater treatment?
SS (Suspended Solids) generally refers to solids in water or effluent, while MLSS (Mixed Liquor Suspended Solids) is specific to activated sludge concentration in aeration tanks. This sensor supports both applications by measuring suspended solids using infrared scattering technology.
What factors most commonly affect the accuracy of online sludge concentration measurement?
Accuracy can be affected by sludge particle size, air bubbles, flow turbulence, sensor fouling, and improper installation depth. Proper installation and routine cleaning significantly reduce these effects.
How often does the SS / MLSS sensor require maintenance?
Maintenance frequency depends on sludge characteristics. In most wastewater plants, cleaning every 1–4 weeks is recommended. The optional automatic cleaning scraper can greatly extend maintenance intervals.
Can the sensor be used in high-concentration sludge environments?
Yes. The sensor supports measurement ranges up to 120,000 mg/L, making it suitable for high-concentration sludge zones such as aeration tanks, return sludge lines, and thickening processes.
How does ISO 7027 technology reduce measurement errors?
SO 7027 infrared scattered light technology minimizes the influence of sample color and ambient light, ensuring consistent and reliable sludge concentration measurement even in dark or colored wastewater.
What is the recommended installation method for stable online measurement?
Submersible installation in areas with stable flow and representative sludge mixing is recommended. Avoid installation near aerators, in dead zones, or areas with excessive turbulence to ensure accurate and stable readings.
Dibangun di atas Konsistensi, Bukan Klaim
Kami mengkhususkan diri dalam analisis dan deteksi industri, dengan pemahaman yang jelas tentang lingkungan dan persyaratan operasi dunia nyata.
Setiap instrumen dievaluasi berdasarkan performa, stabilitas, dan kesesuaian aplikasi-bukan hanya spesifikasi atau harga.
Kami bekerja sama dengan produsen tepercaya untuk memastikan pasokan yang stabil, kualitas yang konsisten, dan pengiriman yang dapat diandalkan.
Rekomendasi kami didasarkan pada pemahaman aplikasi, membantu pelanggan menghindari masalah umum dan mencapai hasil yang dapat diandalkan.
Instrava dibuat untuk mengurangi ketidakpastian-sehingga setiap keputusan yang Anda buat menjadi lebih jelas, aman, dan dapat diandalkan.

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